<template>
    <div>
        <!-- 面包屑导航区 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
            
        </el-breadcrumb>

        <!-- 卡片视图 -->
        <el-card>
            <!-- 添加角色按钮区 -->
            <el-row>
                <el-col>
                    <el-button type="primary" @click="addDialogVisible = true">添加角色</el-button>
                </el-col>
            </el-row>
            

            <el-table :data="rolelist" border stripe>
                <!-- 展开列 -->
                <el-table-column type="expand">
                    <template slot-scope="scope">
                        <el-row :class="['bdbottom', i1 === 0? 'bdtop':'','vcenter']" 
                        v-for="(item1, i1) in scope.row.children" :key="item1.id">
                            <!-- 渲染一级权限 -->
                            <el-col :span="5">
                                <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                                <i class="el-icon-caret-right"></i>
                                
                            </el-col>
                            <!-- 渲染二级和三级权限 -->
                            <el-col :span="19">
                                <!-- 通过for循环嵌套渲染二级权限 -->
                                <el-row :class="[i2 ===0?'':'bdtop','vcenter']" 
                                v-for="(item2,i2) in item1.children" :key="item2.id">
                                    <el-col :span="6">
                                        <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                                        <i class="el-icon-caret-right"></i>
                                    </el-col>
                                    <el-col :span="18">
                                        <el-tag :class="[i3 ===0?'':'bdtop']" 
                                        type="warning" v-for="(item3,i3) in item2.children" 
                                        :key="item3.id" closable 
                                        @close="removeRightById(scope.row,item3.id)">
                                        {{item3.authName}}
                                        </el-tag>
                                    </el-col>
                                </el-row>
                            </el-col>
                        </el-row>
                        <!-- <pre>
                            {{scope.row}}
                        </pre> -->
                    </template>
                </el-table-column>
                <!-- 索引列 -->
                <el-table-column type="index"></el-table-column>
                <el-table-column label="角色名称" prop="roleName"></el-table-column>
                <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
                <el-table-column label="操作" width="300x">
                    <template slot-scope="scope">
                        <el-button size="mini" type="primary" 
                        icon="el-icon-edit">编辑</el-button>
                        <el-button size="mini" type="danger" 
                        icon="el-icon-delete">删除</el-button>
                        <el-button size="mini" type="warning" 
                        icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                    </template>
                </el-table-column>
            </el-table>
        </el-card>

        <!-- 分配权限的对话框 -->
        <el-dialog
          title="分配权限"
          :visible.sync="setRightDialogVisible"
          width="50%" @close="setRightDialogClosed"
          >
          <!-- 树形空间 -->
          <el-tree :data="rightslist" :props="treeProps"  
          show-checkbox node-key="id" default-expand-all 
          :default-expanded-keys="defKeys" ref="treeRef"></el-tree>

          <span slot="footer" class="dialog-footer">
            <el-button @click="setRightDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="allotRights">确 定</el-button>
          </span>
        </el-dialog>
    </div>
</template>

<script>
export default {
    data(){
        return{
            //所有角色列表数据
            rolelist:[],
            //控制分配权限对话框的显示隐藏
            setRightDialogVisible:false,
            //所有权限的数据
            rightslist:[],
            //树形空间的属性绑定对象
            treeProps:{
                label:'authName',
                children:'children'
            },
            //默认选中的节点ID值数组
            defKeys:[],
            //当前即将分配权限角色id
            roleId:''

         
        }
    },
    created(){
        this.getRolesList()
    },
    methods:{
        //获取所有角色列表
        async getRolesList(){
            const {data:res} = await this.$http.get('roles')
            if(res.meta.status !== 200){
                return ths.$message.erroe('获取角色列表失败')
            }

            this.rolelist = res.data
            console.log(this.rolelist)
        },
        //根据ID删除对应的权限
        async removeRightById(role,rightid){
            //弹框提示用户是否要删除
            const confirmResult =  await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
            }).catch(err => err)

            if(confirmResult !== 'confirm'){
                return this.$message.info('取消了删除！')
            }

            // console.log('确认了删除')
            const {data:res}= await 
            this.$http.delete(`roles/${role.id}/
            rights/${rightid}`)

            if(res.meta.status !== 200){
                return this.$message.erroe('删除权限失败！')
            }

            // this.getRolesList()
            role.chirdren = res.data

        },
        //展示分配权限的对话框
        async showSetRightDialog(role){
            this.roleId = role.id
            //获取所有权限的数据
            const {data:res}= await
             this.$http.get(`rights/tree`)


             if(res.meta.status !== 200){
                 return this.$message.error('获取权限数据失败！')
             }

            //把获取到的权限数据保存到data中
            this.rightslist = res.data
            console.log(this.rightslist)

            //递归获取三级节点ID
            this.getLeafKeys(role,this.defKeys)


            this.setRightDialogVisible = true
        },
        //通过递归的形式，获取角色下所有三级权限的id，并保存到dafKeys 数组中
        getLeafKeys(node,arr){
            //如果当前节点不包含children属性，则是三级属性
            if(!node.children){
                return arr.push(node.id)
            }
            node.children.forEach(item=>
            this.getLeafKeys(item,arr))

        },
        //监听分配权限对话框的关闭事件
        setRightDialogClosed(){
            this.defKeys = []
        },
        //为角色分配权限
        async allotRights(){
            const keys = [
                ...this.$refs.treeRef.getCheckedKeys(),
                ...this.$refs.treeRef.getHalfCheckedKeys()
            ]

            
            const idStr = keys.join(',')

            const {data:res} = await 
            this.$http.post(`roles/${this.roleId}/rights`,
            {rids:idStr})

            if(res.meta.status !== 200){
                return this.$message.error('分配权限失败')
            }

            this.$message.success('分配权限成功！')

            this.getRolesList()//刷新列表
            this.setRightDialogVisible= false  //隐藏对话框

            
            

        }

    }
}
</script>

<style lang="less" scoped>
.el-tag{
    margin:7px;
}
.bdtop{
    border-top: 1px solid #eee;
}
.bdbottom{
    border-bottom:1px solid #eee
}
.vcenter{
    display: flex;
    align-items: center;
}
</style>